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华中科技大学, 光电子工程系, 湖北, 武汉, 430074
收稿日期:2002-02-12,
修回日期:2002-07-20,
网络出版日期:2002-10-15,
纸质出版日期:2002-10-15
移动端阅览
徐晓静, 元秀华, 黄德修. 影响激光大气通信距离的诸因素分析[J]. 光学精密工程, 2002,(5): 493-496
XU Xiao-jing, YUAN Xiu-hua, HUANG De-xiu. Analysis of the parameters influencing the distance of free-space laser communication[J]. Editorial Office of Optics and Precision Engineering, 2002,(5): 493-496
激光大气通信技术由于具有宽带大容量、低成本、无需频率许可等优点
近几年来作为一种新的宽带无线接入方式受到人们的广泛关注.激光大气通信距离受多种因素的制约
通常仅数公里.本文在建立激光大气通信系统数学模型的基础上
分析了激光束发散角、大气衰减、激光发射功率以及探测器灵敏度对通信距离的影响
结果显示较窄的光束发散角、较高的探测器灵敏度有利于通信距离的延长
而通过提高激光发射功率来延长通信距离的办法不可取
从而为系统设计提供参考依据.
Free-space laser communication is becoming attractive as a new wideband wireless access technology in recent years by virtue of its many advantages
such as high-bandwidth
low cost and being license-free. Laser beam can only travel a few kilometers through the atmosphere because of some limiting factors. Based on the mathematical model of free-space laser communication
this article analyses the effects of beam divergence
atmospheric attenuation
laser power and detector sensitivity on the link range. The results show that it is effective to extend the range by narrower beam divergence and higher detector sensitivity
and higher laser power is unadvisable. The analyses in this paper are helpful for system design.
邹自立. 悄然复兴的激光大气通信技术[J] . 光通信技术, 1997, 21(3):167-170.
Fuller M. Free-space optics 'available' for the last mile?[J] . LightWave, 2000,17(8):1-2.
Kim I I, Stieger R, Koontz J A, et al. Wireless optical transmission of fast Ethernet, FDDI, ATM, and ESCON protocol data using the TerraLink Laser communication system[J] . Optical Engineering, 1998,37(12):3143-3155.
周炳琨, 高以智, 陈家骅,等. 激光原理[M] . 北京:国防工业出版社,1995.
Arnon S Rotman S R. Beam width and transmitter power adaptive to tracking system performance for free-space optical communication[J] . Applied Optics, 1997,36: 6095-6101.
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